Microwave Induced Thermoacoustic Tomography Part III

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Microwave Induced Thermoacoustic TomographyPart
III

• By Zaid Al-Husseini

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Sections

• How to detect Tumors lt 5mm
• What Frequencies do most people use for their
  Transducers?
• Imaging Equipment Information
• Power Attenuation Information (Using Given
  Equations)
• Conclusion
• Questions

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Detecting Tumors lt 5 mm

• According to Kruger et al. it is possible to
  produce images of biological tissue in the range
  of 1-4 mm by using long wavelength (gt10 cm) UHF
  radio waves and the Thermoacoustic interactions
  that take place.

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Common Transducer Frequencies

• For the Wang et al. experiment, the raw data was
  obtained by a 2.25 MHz non focused transducer
  (Panametrics, V323)
• www.gesensing.com (wide variety of sensors)
• Good list of transducers
• 1. http//www.westerndiagnostics.com/probelist.htm
  
• 2. http//www.medical.siemens.com/webapp/wcs/store
  s/servlet/PSRelatedProductDisplay?relatedCatNameT
  ransducersstoreId10001langId-1catalogId-1ca
  tTree1000012C128052C12823level0productId172
  81
• 3. http//www.panametrics-ndt.com/ndt/ndt_transduc
  ers/contact/fingertip.html
• Transducer Companies Panametrics, Siemens, GE
  sensing
• Kruger et al. used 64 evenly distributed
  transducers (0.5cm) thick all around the breast.

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Imaging Equipment
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Imaging Equipment contd
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Power Attenuation Info.
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Conclusion

• Use existing Microwave generator, but buy an
  amplifier.
• Use several straight signal transducer all around
  breast (like Kruger et al.)
• Use low freq. range to avoid too much signal
  attenuation

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Questions

• What company to use for Transducers?
• Will we need to buy a microwave source?
• Should an RF generator be used instead to obtain
  small object imaging?